APA (7th ed.) Citation

Long, A. K., Giloane, W., Moore, J. M., Walpole, N. A., Keefe, E. K., & Baluyut, V. D. (2010). Area Handbook for Bulgaria. Project Gutenberg.

Chicago Style (17th ed.) Citation

Long, Anne K., William Giloane, James M. Moore, Neda A. Walpole, Eugene K. Keefe, and Violeta D. Baluyut. Area Handbook for Bulgaria. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Long, Anne K., et al. Area Handbook for Bulgaria. Project Gutenberg, 2010.

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