Psidium guajava
- Description, photos, and invasiveness in the Pacific islands.
- http://www.hear.org/pier/species/psidium_guajava.htm

Psidium cattleianum (Strawberry Guava)
- Natural history and control; from The Nature Conservancy's Wildland Invasive Species Team.
- http://tncweeds.ucdavis.edu/esadocs/psidcatt.html

Psidium cattleianum Sabine
- Description, images, and control of Strawberry Guava in Hawaii.
- http://www.botany.hawaii.edu/faculty/cw_smith/psi_cat.htm

Brazilian Guava (Psidium guineense Sw.)
- Description and uses.
- http://www.hort.purdue.edu/newcrop/morton/brazilian_guava_ars.html

Psidium cattleianum
- Description and invasiveness in the Pacific islands.
- http://www.hear.org/pier/pscat.htm

Strawberry Guava (Psidium cattleianum)
- Description, ecological threat, and control in the United States.
- http://www.nps.gov/plants/alien/fact/psca1.htm

Tropical Guava Fruit Facts
- Description and culture of Psidium guajava L.
- http://www.crfg.org/pubs/ff/guava.html