APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.