MLA

Boston, L. M. (Lucy Maria), 1892-1990, author. The children of Green Knowe / by L.M. Boston ; with illustrations by Peter Boston.. https://collections.library.yale.edu/catalog/15505574.

APA, 6th edition

Boston, L. M. (Lucy Maria), 1892-1990, author. [The children of Green Knowe / by L.M. Boston ; with illustrations by Peter Boston.]. https://collections.library.yale.edu/catalog/15505574.