APA استشهاد

Billerbeck,K, & Yasugi,Y. (1979). Private direct foreign investment in developing countries. World Bank.

استشهاد بنمط شيكاغو

Billerbeck,K, و Yasugi,Y. Private Direct Foreign Investment in Developing Countries. Washington: World Bank, 1979.

MLA استشهاد

Billerbeck,K, و Yasugi,Y. Private Direct Foreign Investment in Developing Countries. World Bank, 1979.