Gaya APA

Siregar, H, T, H. (2021). Macroeconomics an evolutionary approach . Bogor: Bogor : IPB Press, 2021.

Gaya MLA

Siregar, Hendri, Tanjung,, Hermanto. "Macroeconomics an evolutionary approach". Bogor: Bogor : IPB Press, 2021, 2021. Ebook.