Black, W. H. (1920). The real Europe pocket guide-book: (number 10 of the "Black's blue books") with 23 simple outline maps of the 33 new countries, and elaborate index. Brentanos.
Chicago Style (17th ed.) CitationBlack, William Harman. The Real Europe Pocket Guide-book: (number 10 of the "Black's Blue Books") with 23 Simple Outline Maps of the 33 New Countries, and Elaborate Index. Washington, New York [etc.]: Brentanos, 1920.
MLA (8th ed.) CitationBlack, William Harman. The Real Europe Pocket Guide-book: (number 10 of the "Black's Blue Books") with 23 Simple Outline Maps of the 33 New Countries, and Elaborate Index. Brentanos, 1920.
Warning: These citations may not always be 100% accurate.