Gaya APA
Guswai, C, F. (2014).
How To Create Outstanding Service. ( buku baru 2015 ) .
Jakarta:
PT.Elex Media Komputindo.
Gaya MLA
Guswai, Christian, F..
"How To Create Outstanding Service. ( buku baru 2015 )".
Jakarta:
PT.Elex Media Komputindo,
2014.
Text.