Cita APA

Viduya, J. T., & Manzo, L. A. (1973). Handbook on customs administration (Rev. ed.). Philippine Research Guide.

Citación estilo Chicago

Viduya, Jose T., and Lourdes A. Manzo. Handbook on Customs Administration. Rev. ed. Quezon City: Philippine Research Guide, 1973.

Cita MLA

Viduya, Jose T., and Lourdes A. Manzo. Handbook on Customs Administration. Rev. ed. Philippine Research Guide, 1973.