APA (7th ed.) Citation

Walker, H. M., & Lev, J. (1969). Elemantary statistical methods: 3rd ed. By Helen M. Walker and Joseph Lev. Rinehart and Winston.

Chicago Style (17th ed.) Citation

Walker, Helen Mary, and Joseph Lev. Elemantary Statistical Methods: 3rd Ed. By Helen M. Walker and Joseph Lev. New York, Holt: Rinehart and Winston, 1969.

MLA (9th ed.) Citation

Walker, Helen Mary, and Joseph Lev. Elemantary Statistical Methods: 3rd Ed. By Helen M. Walker and Joseph Lev. Rinehart and Winston, 1969.