Dyfyniad APA
National Academy of Sciences (U.S.), ebrary, Inc, & True, F. W. (1913). A history of the first half-century of the National Academy of Sciences, 1863-1913. [National Academy Press].
Dyfyniad Arddull Chicago
National Academy of Sciences (U.S.), Inc ebrary, and Frederick William True. A History of the First Half-century of the National Academy of Sciences, 1863-1913. Washington, [D.C.]: [National Academy Press], 1913.
Dyfyniad MLA
National Academy of Sciences (U.S.), et al. A History of the First Half-century of the National Academy of Sciences, 1863-1913. [National Academy Press], 1913.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.