Gaya APA

GmbH, P, D, V. (2011). BUKU PINTAR SAINS : JAGAT RAYA BUMI (CET.1). : NATIONAL GEOGRAPHIC SOCIETY.

Gaya MLA

GmbH, PETER, DELIUS, VERLAG. "BUKU PINTAR SAINS : JAGAT RAYA BUMI". CET.1 : NATIONAL GEOGRAPHIC SOCIETY, 2011. Text.