APA (7th ed.) Citation

Keith, L., Blake, P., & Tiedt, S. (1968). Contemporary curriculum in the elementary school. Harper & Row.

Chicago Style (17th ed.) Citation

Keith, Lowell, Paul Blake, and Sidney Tiedt. Contemporary Curriculum in the Elementary School. New York [u.a.]: Harper & Row, 1968.

MLA (9th ed.) Citation

Keith, Lowell, et al. Contemporary Curriculum in the Elementary School. Harper & Row, 1968.