Παραπομπή APA
(1964). Secretarial practice: The manual of the chartered institute of secretaries of joint stock companies and other public bodies (6th ed.). Cambridge: W. Heffer & Sons.
Παραπομπή Chicago StyleSecretarial Practice: The Manual of the Chartered Institute of Secretaries of Joint Stock Companies and Other Public Bodies. 6th ed. Cambridge: W. Heffer & Sons, 1964.
Παραπομπή MLASecretarial Practice: The Manual of the Chartered Institute of Secretaries of Joint Stock Companies and Other Public Bodies. 6th ed. Cambridge: W. Heffer & Sons, 1964.
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