Cita APA (7th ed.)

Diaz, R. C., Von Oppenfeld, H., & Von Oppenfeld, J. (1961). Case studies of farm families, Laguna Province, Philippines. Department of Agricultural Economics, College of Agriculture, University of the Philippines.

Cita Chicago (17th ed.)

Diaz, Ralph C., Horst Von Oppenfeld, i Judith Von Oppenfeld. Case Studies of Farm Families, Laguna Province, Philippines. [College, Laguna: Department of Agricultural Economics, College of Agriculture, University of the Philippines, 1961.

Cita MLA (9th ed.)

Diaz, Ralph C., et al. Case Studies of Farm Families, Laguna Province, Philippines. Department of Agricultural Economics, College of Agriculture, University of the Philippines, 1961.