Ungson, R. (1975). Abaca marketing, Part I: Bicol. Special Studies Division, Dept. of Agriculture.
Chicagoスタイル(17版)引用形式Ungson, R.D. Abaca Marketing, Part I: Bicol. Quezon City: Special Studies Division, Dept. of Agriculture, 1975.
MLA(9版)引用形式Ungson, R.D. Abaca Marketing, Part I: Bicol. Special Studies Division, Dept. of Agriculture, 1975.
警告: この引用は必ずしも正確ではありません.