APA
U. S. Government Printing House, . (1969). Code of federal regulations food and drugs: title - 21, part - 1 to 119 revised as of january, 1, 1969. Washington: U. S. Government Printing Office.
Chicago
U. S. Government Printing House, . 1969. Code of federal regulations food and drugs: title - 21, part - 1 to 119 revised as of january, 1, 1969. Washington: U. S. Government Printing Office.
Harvard
U. S. Government Printing House, . (1969). Code of federal regulations food and drugs: title - 21, part - 1 to 119 revised as of january, 1, 1969. Washington: U. S. Government Printing Office.
MLA
U. S. Government Printing House, . Code of federal regulations food and drugs: title - 21, part - 1 to 119 revised as of january, 1, 1969. Washington: U. S. Government Printing Office. 1969.