Johnston, B. (1989). practical assessment in science: Physics. heinemann Educational Books.
Chicago-referens (17:e uppl.)Johnston, Brian. Practical Assessment in Science: Physics. London: heinemann Educational Books, 1989.
MLA-referens (9:e uppl.)Johnston, Brian. Practical Assessment in Science: Physics. heinemann Educational Books, 1989.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.