Doughty, Robert A.; Raugh Jr., Harold E. (1991). "Embargo in Historical Perspective". The US Army War College Quarterly: ParametersThe US Army War College Quarterly: Parameters. 21 (1): 21–30. ISSN0031-1723.
Zhang, Hangzhou (2018). Securing the ‘Rice Bowl’. Singapura: Springer. hlm. 219.Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan)
Doughty, Robert A.; Raugh Jr., Harold E. (1991). "Embargo in Historical Perspective". The US Army War College Quarterly: ParametersThe US Army War College Quarterly: Parameters. 21 (1): 21–30. ISSN0031-1723.