Blue book of gardening. Catalogue 1961.

MLA

Blue Book of Gardening. Catalogue 1961. London: Carters Tested Seeds Ltd., 1961.

APA

(1961). Blue book of gardening. Catalogue 1961. London: Carters Tested Seeds Ltd.

Chicago

Blue Book of Gardening. Catalogue 1961. London: Carters Tested Seeds Ltd., 1961.