APA

Katz W. A., . (1977). Introduction to reference work. New York: McGraw-Hill.

Chicago

Katz William A, . 1977. Introduction to reference work. New York: McGraw-Hill.

Harvard

Katz W. A., . (1977). Introduction to reference work. New York: McGraw-Hill.

MLA

Katz William A, . Introduction to reference work. New York: McGraw-Hill. 1977.