APA aipamena

Goldstein Margaret J. Our Univers Stars. Lerner.

Chicago Style aipamena

Goldstein Margaret J. Our Univers Stars. 2003 2003: Lerner.

MLA aipamena

Goldstein Margaret J. Our Univers Stars. Lerner.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.