Gaya APA
Mankiw, N, G. et al (2017).
Principles of economics : Supplement (Edisi Kedelapan).
Singapura:
Cengange Learning Asia.
Gaya MLA
Mankiw, N., Gregory. et al.
"Principles of economics : Supplement".
Edisi Kedelapan
Singapura:
Cengange Learning Asia,
2017.
Text.