Cita APA (7th ed.)

Lacayanga, J. E., & Valdez, W. G. Design, construction, testing and performance evaluation of manually operated four (4) row rice hill seeder for wetland paddy. Philippine agricultural mechanization journal.

Cita Chicago (17th ed.)

Lacayanga, Jonathan E., i Water G. Valdez. "Design, Construction, Testing and Performance Evaluation of Manually Operated Four (4) Row Rice Hill Seeder for Wetland Paddy." Philippine Agricultural Mechanization Journal .

Cita MLA (9th ed.)

Lacayanga, Jonathan E., i Water G. Valdez. "Design, Construction, Testing and Performance Evaluation of Manually Operated Four (4) Row Rice Hill Seeder for Wetland Paddy." Philippine Agricultural Mechanization Journal, .