Gaya APA

Manalu, W. (1997). Indonesian Journal Of Tropical Agriculture Vil. 8 No. 1 Maret 1997 . London: Institut Pertanian bogor Research institute Bogor.

Gaya MLA

Manalu, Wasmen. "Indonesian Journal Of Tropical Agriculture Vil. 8 No. 1 Maret 1997". London: Institut Pertanian bogor Research institute Bogor, 1997. Text.