Gaya APA
R, C, D., Novika, . (2008).
English Conversations and Correspondence Secretaries (Cetakan XIII).
Jakarta:
Puspa Swara.
Gaya MLA
R, Cyssco, Dhanny., Novika, .
"English Conversations and Correspondence Secretaries".
Cetakan XIII
Jakarta:
Puspa Swara,
2008.
Text.