APA

FRANKL V. E., . (1968). Man´s search for meaning. Nueva York: Washington square press.

Chicago

FRANKL Viktor E, . 1968. Man´s search for meaning. Nueva York: Washington square press.

Harvard

FRANKL V. E., . (1968). Man´s search for meaning. Nueva York: Washington square press.

MLA

FRANKL Viktor E, . Man´s search for meaning. Nueva York: Washington square press. 1968.