APA

Steel R. G. D., Torrie J. H. & Dickey D. A. (1997). Pinciples and procedures of statistics a biometrical approach. Boston: McGraw-Hill.

Chicago

Steel Robert G D, Torrie James Hiram and Dickey David A. 1997. Pinciples and procedures of statistics a biometrical approach. Boston: McGraw-Hill.

Harvard

Steel R. G. D., Torrie J. H. and Dickey D. A. (1997). Pinciples and procedures of statistics a biometrical approach. Boston: McGraw-Hill.

MLA

Steel Robert G D, Torrie James Hiram and Dickey David A. Pinciples and procedures of statistics a biometrical approach. Boston: McGraw-Hill. 1997.