A Beowulf handbook /
edited by Robert E. Bjork and John D. Niles.

APA Citation

Niles, J. D., Bjork, R. E. (1997). A Beowulf handbook. Lincoln: University of Nebraska Press.

MLA Citation

Niles, John D, and Robert E. Bjork. A Beowulf Handbook. Lincoln: University of Nebraska Press, 1997.

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