Dyfyniad APA

Johnston, B. (1989). practical assessment in science: Physics. heinemann Educational Books.

Dyfyniad Arddull Chicago

Johnston, Brian. Practical Assessment in Science: Physics. London: heinemann Educational Books, 1989.

Dyfyniad MLA

Johnston, Brian. Practical Assessment in Science: Physics. heinemann Educational Books, 1989.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.