Pili, T. C., Adove, V., & Guevarra, N. (1975). 73 tons! Marketed the hard way! Special Studies Division Planning Service, Office of the Secretary, Department of Agriculture.
Cita Chicago (17th ed.)Pili, T. C., V.B Adove, i N.C Guevarra. 73 Tons! Marketed the Hard Way! Quezon City: Special Studies Division Planning Service, Office of the Secretary, Department of Agriculture, 1975.
Cita MLA (9th ed.)Pili, T. C., et al. 73 Tons! Marketed the Hard Way! Special Studies Division Planning Service, Office of the Secretary, Department of Agriculture, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.