Haines, R. G. (1988). Math principles for food service occupations (2nd ed.). Delmar Pub.
Lua i Stíl Chicago (17ú heag.)Haines, Robert G. Math Principles for Food Service Occupations. 2nd ed. Albany, New York: Delmar Pub, 1988.
Lua MLA (9ú heag.)Haines, Robert G. Math Principles for Food Service Occupations. 2nd ed. Delmar Pub, 1988.
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