Gaya APA
Leo, Sutanto. (2016).
English For Professional Tour Guiding Services .
Jakarta:
Gramedia Pustaka Utama.
Gaya Chicago
Leo, Sutanto.
English For Professional Tour Guiding Services.
Jakarta:
Gramedia Pustaka Utama,
2016.
Buku English.
Gaya MLA
Leo, Sutanto.
English For Professional Tour Guiding Services.
Jakarta:
Gramedia Pustaka Utama,
2016.
Buku English.
Gaya Turabian
Leo, Sutanto.
English For Professional Tour Guiding Services.
Jakarta:
Gramedia Pustaka Utama,
2016.
Buku English.