APA (7th ed.) Citation

Scheerer, O. (1911). The languages of the Philippines. publisher not identified.

Chicago Style (17th ed.) Citation

Scheerer, Otto. The Languages of the Philippines. [Manila: publisher not identified, 1911.

MLA (9th ed.) Citation

Scheerer, Otto. The Languages of the Philippines. publisher not identified, 1911.

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