Wade, T. F., & Hillier, W. C. Yü yen tzŭ êrh chi: A progressive course designed to assist the student of colloquial Chinese. Kelly & Walsh.
Chicago Style (17th ed.) CitationWade, Thomas Francis, and Walter Caine Hillier. Yü Yen Tzŭ êrh Chi: A Progressive Course Designed to Assist the Student of Colloquial Chinese. Shanghai [u.a.]: Kelly & Walsh.
MLA (9th ed.) CitationWade, Thomas Francis, and Walter Caine Hillier. Yü Yen Tzŭ êrh Chi: A Progressive Course Designed to Assist the Student of Colloquial Chinese. Kelly & Walsh.
Warning: These citations may not always be 100% accurate.