Cita APA (7th ed.)

Sperling. JoAnn. (1969). Job descriptions in marketing management. AMA, Inc.

Cita Chicago (17th ed.)

Sperling. JoAnn. Job Descriptions in Marketing Management. New York: AMA, Inc, 1969.

Cita MLA (9th ed.)

Sperling. JoAnn. Job Descriptions in Marketing Management. AMA, Inc, 1969.