Gaya APA

Crabb, C, V, M., Holt, P, M. (c1980). Invitation to struggle: Congress, the President, and foreign policy . Washington DC: Congressional Quarterly Press.

Gaya MLA

Crabb, Cecil, Van, Meter., Holt, Pat, M.. "Invitation to struggle: Congress, the President, and foreign policy". Washington DC: Congressional Quarterly Press, c1980. Text.