Preshaw, R. M., Leavitt, D., & Hoag, G. (2008). The dietary supplement 5-hydroxytryptophan and urinary 5-hydroxyindole acetic acid. Canadian Medical Association.
Chicago-tyylinen lähdeviittausPreshaw, Roy M., Daniel Leavitt, ja Gordon Hoag. The Dietary Supplement 5-hydroxytryptophan and Urinary 5-hydroxyindole Acetic Acid. Canadian Medical Association, 2008.
MLA-viitePreshaw, Roy M., Daniel Leavitt, ja Gordon Hoag. The Dietary Supplement 5-hydroxytryptophan and Urinary 5-hydroxyindole Acetic Acid. Canadian Medical Association, 2008.
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