APA (7th ed.) Citation

Abrahamsen, H. M. (1954). The Philippine Islands, a guide. Pacific Books.

Chicago Style (17th ed.) Citation

Abrahamsen, Helen Mary. The Philippine Islands, a Guide. Palo Alto, Calif: Pacific Books, 1954.

MLA (9th ed.) Citation

Abrahamsen, Helen Mary. The Philippine Islands, a Guide. Pacific Books, 1954.