Boquiren, R. E., Lavega, R. P., & Era, A. P. (1999). Papain production. College of Engineering.
Cita Chicago Style (17a ed.)Boquiren, Randifer E., Rhamses P. Lavega, y Allain P. Era. Papain Production. Diliman, Quezon City: College of Engineering, 1999.
Cita MLA (9a ed.)Boquiren, Randifer E., et al. Papain Production. College of Engineering, 1999.
Precaución: Estas citas no son 100% exactas.