Drake, H. (1952). Revision of the ranges of the pocket gophers of southeastern Washington and northeastern Oregon and the description of a new subspecies, Thomomys talpoides whitmani. Walla Walla College, Dept. of Biological Sciences.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Drake, Harold. Revision of the Ranges of the Pocket Gophers of Southeastern Washington and Northeastern Oregon and the Description of a New Subspecies, Thomomys Talpoides Whitmani. College Place: Walla Walla College, Dept. of Biological Sciences, 1952.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Drake, Harold. Revision of the Ranges of the Pocket Gophers of Southeastern Washington and Northeastern Oregon and the Description of a New Subspecies, Thomomys Talpoides Whitmani. Walla Walla College, Dept. of Biological Sciences, 1952.