Gaya APA
Leo, S. et al (2019).
English for Professional Food & Beverage Services (Cet.1).
Jakarta:
Penerbit Erlangga.
Gaya MLA
Leo, Sutanto. et al.
"English for Professional Food & Beverage Services".
Cet.1
Jakarta:
Penerbit Erlangga,
2019.
Textbook.