APA (7th ed.) Citation

Salcedo, L. M. (1959). A guide to protocol (Rev. ed.). University Book Supply.

Chicago Style (17th ed.) Citation

Salcedo, Luis Moreno. A Guide to Protocol. Rev. ed. Manila: University Book Supply, 1959.

MLA (9th ed.) Citation

Salcedo, Luis Moreno. A Guide to Protocol. Rev. ed. University Book Supply, 1959.