APA (7th ed.) Citation

McIntyre, D. R. (1979). The effects of rung spacing on the mechanics of ladder ascent. [publisher not identified].

Chicago Style (17th ed.) Citation

McIntyre, Donald Ross. The Effects of Rung Spacing on the Mechanics of Ladder Ascent. [Place of publication not identified]: [publisher not identified], 1979.

MLA (9th ed.) Citation

McIntyre, Donald Ross. The Effects of Rung Spacing on the Mechanics of Ladder Ascent. [publisher not identified], 1979.