APA aipamena

LEVIN, H. L. (1978). The Earter Through Time Harold L. Levin. Saunders College.

Chicago Style aipamena

LEVIN, Harold L. The Earter Through Time Harold L. Levin. Saunders College, 1978.

MLA aipamena

LEVIN, Harold L. The Earter Through Time Harold L. Levin. Saunders College, 1978.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.