Παραπομπή APA

Williams Gertrude. (1957). Recruitment to skilled trades. Routledge & Kegan paul.

Παραπομπή Chicago Style

Williams Gertrude. Recruitment to Skilled Trades. London: Routledge & Kegan paul, 1957.

Παραπομπή MLA

Williams Gertrude. Recruitment to Skilled Trades. Routledge & Kegan paul, 1957.