APA

Schoderbek P. P., Kefalas A. G. & Schoderbek C. G.Management systems: conceptual considerations. New York: John Wiley & Sons 1967.

Chicago

Schoderbek Peter P, Kefalas Asterios G and Schoderbek Charles G.Management systems: conceptual considerations. New York: John Wiley & Sons 1967.

Harvard

Schoderbek P. P., Kefalas A. G. and Schoderbek C. G.Management systems: conceptual considerations. New York: John Wiley & Sons 1967.

MLA

Schoderbek Peter P, Kefalas Asterios G and Schoderbek Charles G.New York: John Wiley & Sons 1967. .