APA (7th ed.) Citation

Romulo, C. P. (1961). I walked with heroes ([1st ed.].). Holt, Rinehart and Winston.

Chicago Style (17th ed.) Citation

Romulo, Carlos P. I Walked with Heroes. [1st ed.]. New York: Holt, Rinehart and Winston, 1961.

MLA (9th ed.) Citation

Romulo, Carlos P. I Walked with Heroes. [1st ed.]. Holt, Rinehart and Winston, 1961.