Gaya APA
Butler, L. (2016).
Longman academic writing series 1: sentences to paragraphs 2nd edition (2nd edition).
:
Pearson Education ESL.
Gaya MLA
Butler, Linda.
"Longman academic writing series 1: sentences to paragraphs 2nd edition".
2nd edition
:
Pearson Education ESL,
2016.
Text.