Kalra, N. K., & Kalra, A. (1996). Tension management: Techniques, approaches & strategies. CBS Publication.
Lua i Stíl Chicago (17ú heag.)Kalra, Navin K., agus Alka Kalra. Tension Management: Techniques, Approaches & Strategies. New Delhi: CBS Publication, 1996.
Lua MLA (8ú heag.)Kalra, Navin K., agus Alka Kalra. Tension Management: Techniques, Approaches & Strategies. CBS Publication, 1996.
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