Sethi, S. P. (1973). Multinatioal. Goodyear Publishing Company, Inc.
Lua i Stíl Chicago (17ú heag.)Sethi, S. Prakash. Multinatioal. California: Goodyear Publishing Company, Inc, 1973.
Lua MLA (9ú heag.)Sethi, S. Prakash. Multinatioal. Goodyear Publishing Company, Inc, 1973.
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