Gaya APA

Rumpa, N, P, P, M, D, G, A, &, L, D. (). A Guide To Research Proposal . : Penerbit Andi.

Gaya MLA

Rumpa, Nehru, Pasoloran, Pongsapan,, Markus, Deli, Girik, Allo, &, Lantana, Dioren. "A Guide To Research Proposal". : Penerbit Andi, . Text.