Gaya APA

Cooper, C, L., Torrington, D, P. (1981). After Forty, The Time for Achievement (Edisi 1). New York: John WIley & Sons, Inc.

Gaya MLA

Cooper, Cary, L.., Torrington, Derek, P.. "After Forty, The Time for Achievement". Edisi 1 New York: John WIley & Sons, Inc, 1981. Text.