英語會話十六講=English Conversation 16 - Language

Linguaphone English Course=靈格風英語會話 - Language Institute (Language Institute)

Practical English Usage Introductory - English Language Services (Preston Times, 1976)

Practical English Usage 2 - English Language Services (Times Education, 1977)

Practical English Usage 1 - English Language Services (Times Education, 1977)

Practical English Usage 4 - English Language Services (Preston Times, 1977)

English 900 A Basic Course Three - English Language Services (Collier Macmillan English Program, 1974)

English 900 A Basic Course Six - English Language Services (Collier Macmillan English Program, 1966)

Intensive Course In English Volume II Advanced 1=密集英語會話 - English Language Services (Tung Hua Book (東華書局), 1968)

Spanish grammar simplified: an easy and rapid self-instructor - Hugo's Language Institute (Hugo's Language Institute, 1915)
Keywords: Espagnol (Langue) Étude et enseignement; Spanish language Study and teaching

Key to the "standard" edition of Spanish grammar simplified - Hugo's Language Institute (Hugo's simplified system, 1915)
Keywords: Espagnol (Langue) Grammaire; Lengua española Métodos; Spanish language Grammar