Kranz, P. (1910). The key to the character problem: Or, The Chinese alphabet. Four thousand most frequent characters, according to W.E.Soothill's phonetics, but divided into six classes of frequency with standard Romanisation for self-examination and private study (2nd ed.). Presbyterian Mission Press.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিKranz, Paul. The Key to the Character Problem: Or, The Chinese Alphabet. Four Thousand Most Frequent Characters, According to W.E.Soothill's Phonetics, but Divided into Six Classes of Frequency with Standard Romanisation for Self-examination and Private Study. 2nd ed. Shanghai: Presbyterian Mission Press, 1910.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিKranz, Paul. The Key to the Character Problem: Or, The Chinese Alphabet. Four Thousand Most Frequent Characters, According to W.E.Soothill's Phonetics, but Divided into Six Classes of Frequency with Standard Romanisation for Self-examination and Private Study. 2nd ed. Presbyterian Mission Press, 1910.