APA

worthington r. . b. s., . (1993). nutrition in pregnancy. london: mosby.

Chicago

worthington roberts bonnie s, . 1993. nutrition in pregnancy. london: mosby.

Harvard

worthington r. . b. s., . (1993). nutrition in pregnancy. london: mosby.

MLA

worthington roberts bonnie s, . nutrition in pregnancy. london: mosby. 1993.