APA

Griffiths A. P., . (1991). AYER. Cambridge: University Press.

Chicago

Griffiths A Phillips, . 1991. AYER. Cambridge: University Press.

Harvard

Griffiths A. P., . (1991). AYER. Cambridge: University Press.

MLA

Griffiths A Phillips, . AYER. Cambridge: University Press. 1991.