Dr. Michael Colgan. "Optimum Sports Nutrition". 1993.
S.L. Booth, J.A. Sadowski, J.A. T. Pennington. "Phylloquinone (Vitamin K) Content of Foods in the U.S. Food and Drug Administration's Total Diet Study". 1995 Journal of Agricultural and Food Chemistry 43 6 Pg. 1574 - 1579
Food and Drug Administration (FDA), DHHS. "FDA Total Diet Study". 1983
Food and Drug Administration (FDA), DHHS. "FDA Total Diet Study". 1984
Food and Drug Administration (FDA), DHHS. "FDA Total Diet Study". 1985
Food and Drug Administration (FDA), DHHS. "FDA Total Diet Study". 1986
Nutrient Data Laboratory, ARS, USDA. "National Food and Nutrient Analysis Program Wave 5e". 2001 Beltsville MD
Nutrient Data Laboratory, ARS, USDA. "National Food and Nutrient Analysis Program Wave 5L". 2001 Beltsville MD