Gaya APA
Sembiring, jaffar, Coventry, Philip. (1986).
Toefl a Practical Approach .
:
binacipta.
Gaya Chicago
Sembiring, jaffar, Coventry, Philip.
Toefl a Practical Approach.
:
binacipta,
1986.
Text.
Gaya MLA
Sembiring, jaffar, Coventry, Philip.
Toefl a Practical Approach.
:
binacipta,
1986.
Text.
Gaya Turabian
Sembiring, jaffar, Coventry, Philip.
Toefl a Practical Approach.
:
binacipta,
1986.
Print.