Postal, T. a. T. I. I. C. C. (1977). IX Inter-American Congress. San José, C.R.: Trejos.
Chicago Style CitationPostal, Telegraph and Telephone International Inter-American Congress Caracas). IX Inter-American Congress. San José, C.R.: Trejos, 1977.
MLA CitationPostal, Telegraph and Telephone International Inter-American Congress Caracas). IX Inter-American Congress. San José, C.R.: Trejos, 1977.
Warning: These citations may not always be 100% accurate.