Pei, Mario (1958), One Language for the World, Biblo & Tannen Publishers, p. 145 f, ISBN 9780819602183 {{citation}}: ISBN / Date incompatibility (help) 9780819602183 ↩
Victor H. Mair, ed. (1989), Reviews (II) (PDF), Sino-Platonic Papers, University of Pennsylvania, p. 41 http://www.sino-platonic.org/complete/spp014_chinese_book_reviews.pdf ↩