APA (7th ed.) Citation

Abrahamsen, H. M. (1954). The Philippine islands: A guide. Pacific Books.

Chicago Style (17th ed.) Citation

Abrahamsen, Helen M. The Philippine Islands: A Guide. California: Pacific Books, 1954.

MLA (9th ed.) Citation

Abrahamsen, Helen M. The Philippine Islands: A Guide. Pacific Books, 1954.

Warning: These citations may not always be 100% accurate.