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I am practicing the ば-conditional and my main reference right now is the
oxford grammar book. It only mentions how to convert keiyoushi or i-adjectives
and not keiyoudoushi or na-adjectives.

Can someone please break down how the various verb forms and adjectives
conjugate into this conditional?
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question
verbs conjugations adjectives
How to Convert Na-adjectives and Nouns to the ば-form?
The form used with "ば" to show condition is called "仮定形".

This [wiki
article](https://secure.wikimedia.org/wikipedia/ja/wiki/%E5%B7%B2%E7%84%B6%E5%BD%A2)
gives a good description of this form (the "口語" part. The "文語" part is for
classic Japanese). I will copy the part used for modern Japanese here:

```

    品詞　　　活用の種類　　  例語　　　 語形
    動詞　　　五段活用 　　   書く　　　 かけ　　    -e
    　　　　　 下一段活用　　  受ける　　 うけれ　   -eれ
    　　　　　 上一段活用　　  起きる　　 おきれ　   -iれ
    　　　　　 カ行変格活用   来る　　　 くれ　　    -uれ
    　　　　　 サ行変格活用　 する　　　 すれ　　    -uれ
    形容詞　　　　　　　　　    ない　　　 なけれ　    けれ
    形容動詞　　　　　　　    静かだ　　 しずかなら　 なら
    
```

In general, for verbs, the last kana changes to え-dan(え段). For Na-adjectives,
the ending changes to "なら".

As to Nouns, they do not conjugate itself. The verb used after the noun
conjugate. For example, "先生である" -> "先生であれ(ば)". The verb "である" conjugate to
"であれ".
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For nouns and adjectival nouns (形容動詞), the ば conditional is formed by
attaching the appropriate form of the copula, e.g. ならば for だ, or であれば for である.
However, ならば is not frequently used, and the usual form is なら.

For so-called consonant stem verbs (五段活用動詞), the ば conditional is formed by
attaching _-eba_ to the stem, and for the vowel stem verbs (一段活用動詞), we attach
_-reba_. For the irregular verbs we have:

  * する → すれば
  * くる → くれば

Finally, the adjectives (形容詞) form their ば conditional by attaching _-kereba_
to the stem.

(In the traditional analysis, these are all explained by the rule of attaching
ば to the conditional stem (仮定形). Some of the other conditionals are,
morphologically speaking, special cases of this.)
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answer