APA

Holtje H., . (1981). Schaum's outline of theory and problems of marketing. New York: McGraw-Hill.

Chicago

Holtje Herbert, . 1981. Schaum's outline of theory and problems of marketing. New York: McGraw-Hill.

Harvard

Holtje H., . (1981). Schaum's outline of theory and problems of marketing. New York: McGraw-Hill.

MLA

Holtje Herbert, . Schaum's outline of theory and problems of marketing. New York: McGraw-Hill. 1981.