APA (7th ed.) Citation

Romulo, C. P. (1961). I walked with heroes. Holt, Rinehart & Winston.

Chicago Style (17th ed.) Citation

Romulo, Carlos Pena. I Walked with Heroes. New York: Holt, Rinehart & Winston, 1961.

MLA (9th ed.) Citation

Romulo, Carlos Pena. I Walked with Heroes. Holt, Rinehart & Winston, 1961.