APA
Sherman B., . (1991). The simple guide to organic gardening. London: Collins & Brown.
Chicago
Sherman Bob, . 1991. The simple guide to organic gardening. London: Collins & Brown.
Harvard
Sherman B., . (1991). The simple guide to organic gardening. London: Collins & Brown.
MLA
Sherman Bob, . The simple guide to organic gardening. London: Collins & Brown. 1991.