APA (7th ed.) Citation

BELL, P. M. H. G. WORLD SINCE 1945.

Chicago Style (17th ed.) Citation

BELL, P. M. H.; GILBERT. WORLD SINCE 1945.

MLA (9th ed.) Citation

BELL, P. M. H.; GILBERT. WORLD SINCE 1945.

Warning: These citations may not always be 100% accurate.