Olgado, S. S., Serdanilla, V. E., Domingo, B. H., Pili, T. C., Adove, V. B., Cabilangan, C. K., . . . Guevara, N. C. (1975). Coffee production and marketing: Part I : Mindanao. Special Studies Division Planning Service, Office of the Secretary, Department of Agriculture.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Olgado, S. S., V. E. Serdanilla, B. H. Domingo, T. C. Pili, V. B. Adove, C. K. Cabilangan, B. T. Campos, و N. C. Guevara. Coffee Production and Marketing: Part I : Mindanao. Quezon City: Special Studies Division Planning Service, Office of the Secretary, Department of Agriculture, 1975.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Olgado, S. S., et al. Coffee Production and Marketing: Part I : Mindanao. Special Studies Division Planning Service, Office of the Secretary, Department of Agriculture, 1975.