APA citiranje

ABELL, G. O. Realm of The Universe#George O. Abell. Saunders College Publishing.

Chicago Style (17th ed.) Citation

ABELL, George O. Realm of The Universe#George O. Abell. Saunders College Publishing.

MLA citiranje

ABELL, George O. Realm of The Universe#George O. Abell. Saunders College Publishing.