Counterpoint Pre-intermediate /

由 Ellis, Mark, jezikoslovec., Ellis, Printha.
出版 1986

Counterpoint Elementary /

由 Ellis, Mark, jezikoslovec., Ellis, Printha.
出版 1985

Counterpoint Book 4, Intermediate /

由 Ellis, Mark, jezikoslovec., Ellis, Printha.
出版 1987

Counterpoint Book 1, Beginners /

由 Ellis, Mark, jezikoslovec., Ellis, Printha.
出版 1985

Socializing

由 Ellis, Mark, jezikoslovec., O'Driscoll, Nina.
出版 1987