APA

Williams T. I., . (1969). A biographical dictionary of scientists. New York: Wiley-Interscience.

Chicago

Williams Trevor Illtyd, . 1969. A biographical dictionary of scientists. New York: Wiley-Interscience.

Harvard

Williams T. I., . (1969). A biographical dictionary of scientists. New York: Wiley-Interscience.

MLA

Williams Trevor Illtyd, . A biographical dictionary of scientists. New York: Wiley-Interscience. 1969.