APA (7th ed.) Citation

Colorado. Department of Public Instruction. State of Colorado Arbor Day. [Colorado Department of] Public Instruction.

Chicago Style (17th ed.) Citation

Colorado. Department of Public Instruction. State of Colorado Arbor Day. Denver, Colo.: [Colorado Department of] Public Instruction.

MLA (9th ed.) Citation

Colorado. Department of Public Instruction. State of Colorado Arbor Day. [Colorado Department of] Public Instruction.

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