APA (7th ed.) Citation

(1926). Treasure islands: The Philippines, Hawaii and Porto Rico. Hallgarten.

Chicago Style (17th ed.) Citation

Treasure Islands: The Philippines, Hawaii and Porto Rico. New York: Hallgarten, 1926.

MLA (9th ed.) Citation

Treasure Islands: The Philippines, Hawaii and Porto Rico. Hallgarten, 1926.

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