APA (7th ed.) Citation

Orbos, R. S., & Tan, E. A. (1970). Estimation of returns to education. s.n.

Chicago Style (17th ed.) Citation

Orbos, Rosita Sioson, and Edita A. Tan. Estimation of Returns to Education. [S.l: s.n, 1970.

MLA (9th ed.) Citation

Orbos, Rosita Sioson, and Edita A. Tan. Estimation of Returns to Education. s.n, 1970.