Von Riekhoff, H. (1967). NATO: Issues and prospects. The Canadian Institute of International Affairs.
Lua i Stíl Chicago (17ú heag.)Von Riekhoff, Harald. NATO: Issues and Prospects. Toronto, Ontario: The Canadian Institute of International Affairs, 1967.
Lua MLA (9ú heag.)Von Riekhoff, Harald. NATO: Issues and Prospects. The Canadian Institute of International Affairs, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.