Penggayaan APA
Riddell, Tom. (2011).
Economics: (9th.Ed.).
Boston:
Addison-Wesley.
Chicago Style
Riddell, Tom.
Economics:.
9th.Ed.
Boston:
Addison-Wesley,
2011.
Buku.
MLA Style
Riddell, Tom.
Economics:.
9th.Ed.
Boston:
Addison-Wesley,
2011.
Buku.
Turabian Style
Riddell, Tom.
Economics:.
9th.Ed.
Boston:
Addison-Wesley,
2011.
Buku.