APA

williams d. h., . (19). spectroscopic methods in organic chemistry. New York: mcgraw-hill.

Chicago

williams dudley h, . 19. spectroscopic methods in organic chemistry. New York: mcgraw-hill.

Harvard

williams d. h., . (19). spectroscopic methods in organic chemistry. New York: mcgraw-hill.

MLA

williams dudley h, . spectroscopic methods in organic chemistry. New York: mcgraw-hill. 19.