Cannibals won for Christ:
a story of missionary perils and triumphs in Tongoa, New Hebrides,
by Oscar Michelsen, with introd. by G.C. Frederick.

APA Citation

Michelsen, O. (1890). Cannibals won for Christ: a story of missionary perils and triumphs in Tongoa, New Hebrides. London: Morgan and Scott.

MLA Citation

Michelsen, Oscar. Cannibals Won for Christ: a Story of Missionary Perils And Triumphs In Tongoa, New Hebrides. London: Morgan and Scott, 1890.

Warning: These citations may not always be complete (especially for serials).