APA

Walter R., . (1991). The chemistry and technology of pectin. New York: Academic Press.

Chicago

Walter Reginald, . 1991. The chemistry and technology of pectin. New York: Academic Press.

Harvard

Walter R., . (1991). The chemistry and technology of pectin. New York: Academic Press.

MLA

Walter Reginald, . The chemistry and technology of pectin. New York: Academic Press. 1991.