Παραπομπή APA

Pettman, B. O. (1975). Labour turnover and retention. Gower press.

Παραπομπή Chicago Style

Pettman, Barrie O. Labour Turnover and Retention. great Britian: Gower press, 1975.

Παραπομπή MLA

Pettman, Barrie O. Labour Turnover and Retention. Gower press, 1975.