APA

Willis K., Schimmel W. T., Radlauer S. k. o. t. p. c. & Lieberman S. A. (1995). Step by step computer keyboarding. New York: Barron's Educational Series.

Chicago

Willis K.K, Schimmel Warren T, Radlauer Steven.Step-by-step keyboarding on the personal computer and Lieberman Stanley A. 1995. Step by step computer keyboarding. New York: Barron's Educational Series.

Harvard

Willis K., Schimmel W. T., Radlauer S. k. o. t. p. c. and Lieberman S. A. (1995). Step by step computer keyboarding. New York: Barron's Educational Series.

MLA

Willis K.K, Schimmel Warren T, Radlauer Steven.Step-by-step keyboarding on the personal computer and Lieberman Stanley A. Step by step computer keyboarding. New York: Barron's Educational Series. 1995.