Gaya APA
Leo, S.
(2017).
ENGLISH FOR ACADEMIC PURPOSE : Essay Writing
(
edisi 1)
.
YOGYAKARTA:
cv. andi offset.
Gaya MLA
Leo, Sutanto.
"ENGLISH FOR ACADEMIC PURPOSE : Essay Writing".
edisi 1
YOGYAKARTA:
cv. andi offset,
2017.
Text.