Gaya APA
Siregar,Masitowarni, ., Pulungan, A, H. (2018).
Teaching english as foreign language .
Medan:
fbs unimed press.
Gaya MLA
Siregar,Masitowarni, ., Pulungan, Anni, Holila.
"Teaching english as foreign language".
Medan:
fbs unimed press,
2018.
Text.