Dyfyniad APA

Rockcastle, V. N., Salomon, F. R., & Schmidt, V. E. (1975). Elementary school science, level 2. Addison-Wesley.

Dyfyniad Arddull Chicago

Rockcastle, Verne N., Frank R. Salomon, and Victor E. Schmidt. Elementary School Science, Level 2. Menlo Park, CA: Addison-Wesley, 1975.

Dyfyniad MLA

Rockcastle, Verne N., et al. Elementary School Science, Level 2. Addison-Wesley, 1975.

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