APA (7th ed.) Citation

Wright, B. E. (1973). Critical variables in differentiation. Prentice-Hall.

Chicago Style (17th ed.) Citation

Wright, Barbara E. Critical Variables in Differentiation. Englewood Cliffs, N.J: Prentice-Hall, 1973.

MLA (9th ed.) Citation

Wright, Barbara E. Critical Variables in Differentiation. Prentice-Hall, 1973.