Cita APA (7th ed.)

Payumo, J. S., Sandoval, B., & Tarrayo, R. J. (1987). A Study on the quality control mechanisms in the manufacture of a purgative drug from the seeds of the Niog-niogan plant. College of Engineering.

Cita Chicago (17th ed.)

Payumo, Jaymond S., Benjamin Sandoval, i Romeo Jr Tarrayo. A Study on the Quality Control Mechanisms in the Manufacture of a Purgative Drug from the Seeds of the Niog-niogan Plant. Diliman, Quezon City: College of Engineering, 1987.

Cita MLA (9th ed.)

Payumo, Jaymond S., et al. A Study on the Quality Control Mechanisms in the Manufacture of a Purgative Drug from the Seeds of the Niog-niogan Plant. College of Engineering, 1987.