al, K. P. e. (1991). PROSIDING OMPERENSI NASIONAL KAKAO III. PB. Medan.
Chicago Style (17th ed.) Citational, Kabul Pamin et. PROSIDING OMPERENSI NASIONAL KAKAO III. PB. Medan, 1991.
MLA (8th ed.) Citational, Kabul Pamin et. PROSIDING OMPERENSI NASIONAL KAKAO III. PB. Medan, 1991.
Warning: These citations may not always be 100% accurate.