Citrus fruit is also a source of citric acid, whilst malic acid is found in apples, plums and pumpkins (amongst other foods).
(Citrus fruit; is also; a source of citric acid) (malic acid; is found; L:in apples, plums and pumpkins)
Citrus fruit malic acid
is also is found
a source of citric acid
L:in apples, plums and pumpkins