The book of Merlin :
The book of Sir Balin : from Malory's King Arthur, with Caxton's preface /
edited with an introductory sketch and glossary by Clarence Griffin Child.

APA Citation

Malory, T., Caxton, W., Child, C. Griffin., Caxton, W., Child, C. Griffin. (1904). The book of Merlin: The book of Sir Balin : from Malory's King Arthur, with Caxton's preface. Boston: Houghton, Mifflin.

MLA Citation

Child, C. Griffin, et al.. The Book of Merlin: The Book of Sir Balin : From Malory's King Arthur, With Caxton's Preface. Boston: Houghton, Mifflin, 1904.

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