APA (7th ed.) Citation

Thomas, D., & Gieser, R. (1973). A decimal classification for Philippine languages.

Chicago Style (17th ed.) Citation

Thomas, David, and Richard Gieser. A Decimal Classification for Philippine Languages. 1973.

MLA (9th ed.) Citation

Thomas, David, and Richard Gieser. A Decimal Classification for Philippine Languages. 1973.

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