APA (7th ed.) Citation

Roffe, G. E., & Roffe, T. W. (1956). Spoken Lao. American Council of Learned Societies.

Chicago Style (17th ed.) Citation

Roffe, G. Edward, and Thelma W. Roffe. Spoken Lao. Washington: American Council of Learned Societies, 1956.

MLA (9th ed.) Citation

Roffe, G. Edward, and Thelma W. Roffe. Spoken Lao. American Council of Learned Societies, 1956.