Παραπομπή σε μορφή APA (7η εκδ.)
ebrary, Inc. (2002). Keep fit for life: Meeting the nutritional needs of older persons. World Health Organization ; Tufts University, School of Nutrition and Policy.
Παραπομπή σε μορφή Chicago (17η εκδ.)
ebrary, Inc. Keep Fit for Life: Meeting the Nutritional Needs of Older Persons. Geneva : [Medford, Mass.]: World Health Organization ; Tufts University, School of Nutrition and Policy, 2002.
Παραπομπή σε μορφή MLA (9th εκδ.)
ebrary, Inc. Keep Fit for Life: Meeting the Nutritional Needs of Older Persons. World Health Organization ; Tufts University, School of Nutrition and Policy, 2002.
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