Professionalization
MLA
Vollmer, Howard M, and D. L Mills. Professionalization. Englewood Cliffs, N.J.: Prentice-Hall, 1966
APA, 7th edition
Vollmer, H. M, & Mills, D. L. (1966). Professionalization. Englewood Cliffs, N.J.: Prentice-Hall
Chicago, 17th edition
Vollmer, Howard M., and D. L Mills. Professionalization. Englewood Cliffs, N.J.: Prentice-Hall, 1966