Gumilëv, L. N., & Smith, R. E. F. (1987). Searches for an imaginary kingdom: The legend of the kingdom of Prester John. Cambridge Univ. Press.
Chicago Style (17th ed.) CitationGumilëv, Lev Nikolaevič, and Robert Ernest Frederick Smith. Searches for an Imaginary Kingdom: The Legend of the Kingdom of Prester John. Cambridge [u.a.]: Cambridge Univ. Press, 1987.
MLA (9th ed.) CitationGumilëv, Lev Nikolaevič, and Robert Ernest Frederick Smith. Searches for an Imaginary Kingdom: The Legend of the Kingdom of Prester John. Cambridge Univ. Press, 1987.
Warning: These citations may not always be 100% accurate.