APA引文

Fretland VanVoorst, J. (2020). Igneous rocks. Bellwether Media.

Chicago Style (17th ed.) Citation

Fretland VanVoorst, Jenny. Igneous Rocks. Minneapolis, MN: Bellwether Media, 2020.

MLA引文

Fretland VanVoorst, Jenny. Igneous Rocks. Bellwether Media, 2020.

警告：這些引文格式不一定是100％准確.