Pennington, J. A. T. (1976). Dietary nutrient guide. AVI Pub.
Lua i Stíl Chicago (17ú heag.)Pennington, Jean A. Thompson. Dietary Nutrient Guide. Westport, Conn: AVI Pub, 1976.
Lua MLA (9ú heag.)Pennington, Jean A. Thompson. Dietary Nutrient Guide. AVI Pub, 1976.
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