APA

Heller L. G., . (1972). Communicational analysis and methodology for historians. New York: New York University Press.

Chicago

Heller Louis G, . 1972. Communicational analysis and methodology for historians. New York: New York University Press.

Harvard

Heller L. G., . (1972). Communicational analysis and methodology for historians. New York: New York University Press.

MLA

Heller Louis G, . Communicational analysis and methodology for historians. New York: New York University Press. 1972.