Cita APA

Zelko, H. P. (1957). Succesful conference and discussion techniques. Mc Graw- Hill Book Company Inc.

Chicago Edition Citation

Zelko, Harold P. Succesful Conference and Discussion Techniques. U S A: Mc Graw- Hill Book Company Inc, 1957.

Cita MLA

Zelko, Harold P. Succesful Conference and Discussion Techniques. Mc Graw- Hill Book Company Inc, 1957.