Παραπομπή APA

Puddephatt, R. (1972). periodic table of the elements. Oxford University.

Παραπομπή Chicago Style

Puddephatt, R.J. Periodic Table of the Elements. London: Oxford University, 1972.

Παραπομπή MLA

Puddephatt, R.J. Periodic Table of the Elements. Oxford University, 1972.