Fred Schaaf (Macmillan 1988) 40 Nights to Knowing the Sky: A Night-by-Night Sky-Watching Primer, pp. 79 (ISBN 9780805046687).
ज्येष्ठा तारा मूल तारा तारामंडल वॄश्चिक राशि Fred Schaaf (Macmillan 1988) 40 Nights to Knowing the Sky: A Night-by-Night Sky-Watching Primer, pp.  79, ISBN 9780805046687.