APA (7th ed.) Citation

Robertson, D. (2023). The portal keeper. Tundra.

Chicago Style (17th ed.) Citation

Robertson, David. The Portal Keeper. [Toronto]: Tundra, 2023.

MLA (8th ed.) Citation

Robertson, David. The Portal Keeper. Tundra, 2023.

Warning: These citations may not always be 100% accurate.