Gaya APA

Ridpath, Ian, Gunston, Bill. (1978). Manusia & Material: Batu Bara (Cet. 1.--). Jakarta: Indira.

Gaya Chicago

Ridpath, Ian, Gunston, Bill. Manusia & Material: Batu Bara. Cet. 1.-- Jakarta: Indira, 1978. Text.

Gaya MLA

Ridpath, Ian, Gunston, Bill. Manusia & Material: Batu Bara. Cet. 1.-- Jakarta: Indira, 1978. Text.

Gaya Turabian

Ridpath, Ian, Gunston, Bill. Manusia & Material: Batu Bara. Cet. 1.-- Jakarta: Indira, 1978. Print.