APA

Frankl V. E., . (1997). Man´s search for ultimate meaning. New York: Insight Books.

Chicago

Frankl Viktor E, . 1997. Man´s search for ultimate meaning. New York: Insight Books.

Harvard

Frankl V. E., . (1997). Man´s search for ultimate meaning. New York: Insight Books.

MLA

Frankl Viktor E, . Man´s search for ultimate meaning. New York: Insight Books. 1997.