Gaya APA

Hutagalung, B, H., Abigail, M. (2020). Crippling Middle, The: A Further Analysis on Indonesian Geopolitical Factors in the Past and Its Relevance Today . Jakarta: SMA Kristen Calvin.

Gaya MLA

Hutagalung, Beruchiya, Hannah., Abigail, Michelle. "Crippling Middle, The: A Further Analysis on Indonesian Geopolitical Factors in the Past and Its Relevance Today". Jakarta: SMA Kristen Calvin, 2020. Karya Cetak.