Gaya APA

Coventry, J, S, :, P. (1986). Toefi : A Practical Approach jilid 1 . Jakarta: Binacipta.

Gaya MLA

Coventry, Jaffar, Sembiring, :, Philip. "Toefi : A Practical Approach jilid 1". Jakarta: Binacipta, 1986. Text.