APA aipamena

Summer, J. (1982). Food hygiene. do is right!2. food protection. s.l.].

Chicago Style aipamena

Summer, J. Food Hygiene. Do Is Right!2. Food Protection. [s.n: s.l.], 1982.

MLA aipamena

Summer, J. Food Hygiene. Do Is Right!2. Food Protection. s.l.], 1982.