Sayaboc, L. (1978). Production and marketing of palay seed: Ilocos Region. Special Studies Division, Dept. of Agriculture.
Cita Chicago (17th ed.)Sayaboc, L.S. Production and Marketing of Palay Seed: Ilocos Region. Quezon City: Special Studies Division, Dept. of Agriculture, 1978.
Cita MLA (9th ed.)Sayaboc, L.S. Production and Marketing of Palay Seed: Ilocos Region. Special Studies Division, Dept. of Agriculture, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.