Gaya APA
Sembiring, Jaffar, Coventry, Philip. (1986).
TOEFL : a practical approach .
Jakarta:
Binacipta.
Gaya Chicago
Sembiring, Jaffar, Coventry, Philip.
TOEFL : a practical approach.
Jakarta:
Binacipta,
1986.
Buku.
Gaya MLA
Sembiring, Jaffar, Coventry, Philip.
TOEFL : a practical approach.
Jakarta:
Binacipta,
1986.
Buku.
Gaya Turabian
Sembiring, Jaffar, Coventry, Philip.
TOEFL : a practical approach.
Jakarta:
Binacipta,
1986.
Buku.