APA-viite (7. p.)

Cram, I. A. (1972). Litter collection in country areas. Institution of Municipal Engineers.

Chicago-viite (17. p.)

Cram, Ian Alexander. Litter Collection in Country Areas. London: Institution of Municipal Engineers, 1972.

MLA-viite (8. p.)

Cram, Ian Alexander. Litter Collection in Country Areas. Institution of Municipal Engineers, 1972.