Gardeners' chronicle of America.
APA Citation
American Rock Garden Society., American Association of Park Superintendents., National Association of Gardeners. Gardeners' chronicle of America. [New York, etc.].
MLA Citation
American Rock Garden Society, American Association of Park Superintendents, and National Association of Gardeners. Gardeners' Chronicle of America. [New York, etc.],
Warning: These citations may not always be complete (especially for serials).