Cita APA (7th ed.)

Librero, A. R., Valmayor, R. V., & Perez, M. L. (1987). Research evaluation systems in agriculture and natural resources in the Philippines. International Development Research Centre.

Cita Chicago (17th ed.)

Librero, Aida Recto, Ramon V. Valmayor, i Maripaz L. Perez. Research Evaluation Systems in Agriculture and Natural Resources in the Philippines. Los Banos, Laguna: International Development Research Centre, 1987.

Cita MLA (9th ed.)

Librero, Aida Recto, et al. Research Evaluation Systems in Agriculture and Natural Resources in the Philippines. International Development Research Centre, 1987.