Styl cytowania APA

Biswal, D., & Rao,J.K. (1980). Commercial correspondence (3rd rev. ed.). Kalyani.

Styl cytowania Chicago

Biswal, D., i Rao,J.K. Commercial Correspondence. 3rd rev. ed. Ludhiana: Kalyani, 1980.

Styl cytowania MLA

Biswal, D., i Rao,J.K. Commercial Correspondence. 3rd rev. ed. Kalyani, 1980.