

References
^ Ben Helm, Kelly BillingWater Gardener's Bible : A Step-by-Step Guide to Building, Planting, Stocking, and Maintaining a Backyard Water Garden by Kelly Billing and Ben Helm (2008, Paperback) ISBN 9781594866586 (revised Apr 2015)^ Ben Helm and Kelly Billing (2014). The Water Gardener's Bible; A Step-by-Step Guide to Building, Planting, Stocking, and Maintaining a Backyard Water Garden, Rodale Books. BiggerBooks. ISBN 9781594866586 (revised Aug 2023)
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