"PREFACE". The X of Psychology: An Essay on the Problem of the Science of Mind, Cambridge, MA and London, England: Harvard University Press, 1940, pp. vii-x. https://doi.org/10.4159/harvard.9780674423534.prf
(1940). PREFACE. In The X of Psychology: An Essay on the Problem of the Science of Mind (pp. vii-x). Cambridge, MA and London, England: Harvard University Press. https://doi.org/10.4159/harvard.9780674423534.prf
1940. PREFACE. The X of Psychology: An Essay on the Problem of the Science of Mind. Cambridge, MA and London, England: Harvard University Press, pp. vii-x. https://doi.org/10.4159/harvard.9780674423534.prf
"PREFACE" In The X of Psychology: An Essay on the Problem of the Science of Mind, vii-x. Cambridge, MA and London, England: Harvard University Press, 1940. https://doi.org/10.4159/harvard.9780674423534.prf
PREFACE. In: The X of Psychology: An Essay on the Problem of the Science of Mind. Cambridge, MA and London, England: Harvard University Press; 1940. p.vii-x. https://doi.org/10.4159/harvard.9780674423534.prf