The Niagara book,
by W. D. Howells, Mark Twain ... N. S. Shaler, and others.

APA Citation

Shaler, N. Southgate., Twain, M., Howells, W. Dean. (1901). The Niagara book. New York: Doubleday, Page & co..

MLA Citation

Shaler, Nathaniel Southgate, 1841-1906, Mark Twain, and William Dean Howells. The Niagara Book. New York: Doubleday, Page & co., 1901.

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