Gaya APA
Matthiesen, S, J. (2014).
Essential Words For the TOEFL : Test of English as a Foreigne Language (Ed. 6).
New York:
Barrons.
Gaya MLA
Matthiesen, Steven, J..
"Essential Words For the TOEFL : Test of English as a Foreigne Language".
Ed. 6
New York:
Barrons,
2014.
Buku.