APA
Gassenheimer L., . (2007). Perfect portion : how to eat your favourite foods and still lose weight. London: Dorling Kindersley.
Chicago
Gassenheimer Linda, . 2007. Perfect portion : how to eat your favourite foods and still lose weight. London: Dorling Kindersley.
Harvard
Gassenheimer L., . (2007). Perfect portion : how to eat your favourite foods and still lose weight. London: Dorling Kindersley.
MLA
Gassenheimer Linda, . Perfect portion : how to eat your favourite foods and still lose weight. London: Dorling Kindersley. 2007.