Gaya APA
Rose, J, H, A, F. (1996).
Guide to PROFESSIONAL and BUSINESS CORRESPONDENCE .
Jakarta Pusat:
PT. PUSTAKA BINAMAN PRESSIDO.
Gaya MLA
Rose, Joseph, Harvard, And, Felix.
"Guide to PROFESSIONAL and BUSINESS CORRESPONDENCE".
Jakarta Pusat:
PT. PUSTAKA BINAMAN PRESSIDO,
1996.
Text.