Cite
Hardy Nikko blue hydrangea : the most beautiful hardy blue hydrangea
MLA
Willis Nursery Company, and Henry G. Gilbert Nursery and Seed Trade Catalog Collection. Hardy Nikko Blue Hydrangea : The Most Beautiful Hardy Blue Hydrangea. 1957. EBSCOhost, widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edsbhl&AN=edsbhl.title.206658&authtype=sso&custid=ns315887.
APA
Willis Nursery Company, & Henry G. Gilbert Nursery and Seed Trade Catalog Collection. (1957). Hardy Nikko blue hydrangea : the most beautiful hardy blue hydrangea.
Chicago
Willis Nursery Company, and Henry G. Gilbert Nursery and Seed Trade Catalog Collection. 1957. Hardy Nikko Blue Hydrangea : The Most Beautiful Hardy Blue Hydrangea. Ottawa. http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edsbhl&AN=edsbhl.title.206658&authtype=sso&custid=ns315887.