Lua APA (7ú heag.)

KRISHNA, M. (1990). DEVELOPING COMMUNICATION SKILLS. MACMILLAN.

Lua i Stíl Chicago (17ú heag.)

KRISHNA, MOHAN. DEVELOPING COMMUNICATION SKILLS. NEW DELHI: MACMILLAN, 1990.

Lua MLA (9ú heag.)

KRISHNA, MOHAN. DEVELOPING COMMUNICATION SKILLS. MACMILLAN, 1990.

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