Ludy, R. B., & Youngken, H. W. (1926). Answers to questions prescribed to pharmaceutical state boards (3d ed., rev. and enl.). J.J. McVey.
Lua i Stíl Chicago (17ú heag.)Ludy, Robert Borneman, agus Heber Wilkinson Youngken. Answers to Questions Prescribed to Pharmaceutical State Boards. 3d ed., rev. and enl. Philadelphia: J.J. McVey, 1926.
Lua MLA (8ú heag.)Ludy, Robert Borneman, agus Heber Wilkinson Youngken. Answers to Questions Prescribed to Pharmaceutical State Boards. 3d ed., rev. and enl. J.J. McVey, 1926.
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