Gaya APA

Sumadia, R. (). Laut : The Sea (aneka wajah bumi = the features of the earth) . Jakarta: Tira Pustaka, 1999.

Gaya MLA

Sumadia, R. "Laut : The Sea (aneka wajah bumi = the features of the earth)". Jakarta: Tira Pustaka, 1999, . Text.