APA
Helm K. K., . (1987). The entrepreneurial nutritionist. Harper & row, New York: .
Chicago
Helm Kathy King, . 1987. The entrepreneurial nutritionist. Harper & row, New York: .
Harvard
Helm K. K., . (1987). The entrepreneurial nutritionist. Harper & row, New York: .
MLA
Helm Kathy King, . The entrepreneurial nutritionist. Harper & row, New York: . 1987.