Parker, G. H. Animal colours changes and their neurohumours. Cambridge university press.
استشهاد بنمط شيكاغوParker, George Howard. Animal Colours Changes and Their Neurohumours. Cambridge university press.
MLA استشهادParker, George Howard. Animal Colours Changes and Their Neurohumours. Cambridge university press.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.