Heddy, I. S. (1989). Budidaya Tanaman Cokelat. Angkasa.
Chicago Style (17th ed.) CitationHeddy, Ir. Suwasono. Budidaya Tanaman Cokelat. Angkasa, 1989.
MLA (8th ed.) CitationHeddy, Ir. Suwasono. Budidaya Tanaman Cokelat. Angkasa, 1989.
Warning: These citations may not always be 100% accurate.