Dyfyniad APA

BULLIS, L. H., & MIELKE, J. E. (1985). Strategic and critical materials. Westview Press.

Dyfyniad Arddull Chicago

BULLIS, L. Harold, and James E. MIELKE. Strategic and Critical Materials. Boulder: Westview Press, 1985.

Dyfyniad MLA

BULLIS, L. Harold, and James E. MIELKE. Strategic and Critical Materials. Westview Press, 1985.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.