O'Sullivan, P. (1986). Geopolitics. Croom Helm.
Chicagoスタイル(17版)引用形式O'Sullivan, Patrick. Geopolitics. London: Croom Helm, 1986.
MLA(9版)引用形式O'Sullivan, Patrick. Geopolitics. Croom Helm, 1986.
警告: この引用は必ずしも正確ではありません.
APA(7版)引用形式