Gaya APA
Groth, C. (2013).
Essay Writing English for Academic Purposes: with exercises and answer key .
Yogyakarta:
Andi Offset.
Gaya MLA
Groth, Cheryl.
"Essay Writing English for Academic Purposes: with exercises and answer key".
Yogyakarta:
Andi Offset,
2013.
Buku Tercetak.